"Charlotte isn't into the celebrity gym thing at all," Contactmusic quoted Church's mother Maria, as saying.
"Celebrities who have babies seem to be stick thin again within weeks - they must spend every waking hour at the gym.
Charlotte is determined to get the weight off, but she will do it gradually.
"It usually takes most women six months to a year and that is the goal she has set herself.
"Being with her new baby is far more important to Charlotte than some silly workout, " she added.